Question:
Ali and Sara started jogging from the same place in opposite directions along a straight path. Both of them did not change their speed. After jogging for 40 minutes, they were 7 km apart. Ali’s average speed was 30m/min faster than Sara’s. How far did Ali jog?
Solution:
![P6 / Tao Nan / 2020 / SA2 Prelims / Paper 2 – Q07 [3 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/12/P6_Tao_Nan_2020_SA2_Paper2_Q07-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / River Valley / 2019 / SA1 / Paper 2 – Q09 [3 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/05/P6_River_valley_2019_SA1_Paper2_Q09-Qns.jpg?resize=400%2C260&ssl=1)